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-rw-r--r--sound/soc/imx/imx-audmux.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/soc/imx/imx-audmux.c b/sound/soc/imx/imx-audmux.c
index 912a342ef77..0fe66c3dde1 100644
--- a/sound/soc/imx/imx-audmux.c
+++ b/sound/soc/imx/imx-audmux.c
@@ -79,6 +79,9 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
if (!buf)
return -ENOMEM;
+ if (!audmux_base)
+ return -ENOSYS;
+
if (audmux_clk)
clk_prepare_enable(audmux_clk);